Cheiruridae

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: †Trilobita
Ordo: †Phacopida
Subordo: †Cheirurina
Superfamilia: Cheiruroidea
Familia: Cheiruridae
Genera: Acanthoparypha – Actinopeltis – Anasobella – Ancyginaspis – Apollonaspis – Arcticeraurinella – Areia – Areiaspis – Azyptyx – Barrandeopeltis – Borealaspis – Bornholmaspis – Bufoceraurus – Ceraurinella – Ceraurinium – Ceraurinus – Cerauromeros – Cerauropeltis – Ceraurus – Cheirurus – Chiozoon – Contracheirurus – Courtessolium – Crotalocephalides – Crotalocephalina – Crotalocephalus – Ceraurinella – Cybelloides – Cyrtometopus – Deiphon – Didrepanon – Eccoptochile – Eccoptochiloides – Forteyops – Foulonia – Gabriceraurus – Geracephalina – Hadromeros – Hammannopyge – Hapsiceraurus – Heliomera – Heliomeroides – Holia – Hyrokybe – Junggarella – Kawina – Kolymella – Krattaspis – Ktenoura – Laneites – Lehua – Leviceraurus – Nieszkowskia – Onycopyge – Osekaspis – Pandaspinapyga – Paraceraurus – Parasphaerexochus – Parayoungia – Parisoceraurus – Pateraspis – Patomaspis – Placoparina – Pompeckia – Proromma – Protocerauroides – Pseudocheirurus – Pseudosphaerexochus – Radiurus – Ratinkaspis – Reraspis – Skelipyx – Sphaerexochus – Sphaerocoryphe – Stubblefieldia – Sycophantia – Turantyx – Valongia – Whittakerites – Xylabion – Xystocrania – Youngia – Zazvorkaspis

Name
Cheiruridae Salter 1864

Cheiruridae is a family of phacopid trilobites of the suborder Cheirurina. Its members, as with other members of the suborder, had distinctive pygidia modified into finger-like spines. They first appeared in the uppermost Cambrian (upper Furongian), and persisted until the end of the Middle Devonian (Givetian). Currently about 657 species assigned to 99 genera are included.[1]
Distribution

The subfamily Cheirurinae with 269 species in 38 genera occur from the Floian to the Givetian and are probably monophyletic. The 109 species in 15 genera of the Acanthoparyphinae are also probably monophyletic, and are known from the Floian to the Ludfordian. The Cyrtometopinae were present between the Floian and the Upper Katian, enveloping 22 species in 5 genera, of which the monophyly is unclear. The Deiphoninae are probably monophyletic, occur from the Dapingian to the Gorstian, having 71 species assigned to 6 genera. The possibly paraphyletic Eccoptochilinae with 67 species in 13 genera are known between the Floian and upper Katian. The Heliomerinae are a small monophyletic group with 13 species in 2 genera. The Pilekiinae are the earliest subfamilily and therefore certainly paraphyletic, occurring in the upper Furongian and going extinct in the Darriwilian with 56 known species assigned to 19 genera. The monotypic Sphaerexochinae has about 50 species between the Floian and Přídolí.[1]
Genera

†Acanthoparypha
†Actinopeltis
†Anasobella
†Ancyginaspis
†Apollonaspis
†Arcticeraurinella
†Areia
†Areiaspis
†Azyptyx
†Barrandeopeltis
†Borealaspis
†Bornholmaspis
†Bufoceraurus
†Ceraurinella
†Ceraurinium
†Ceraurinus
†Cerauromeros
†Cerauropeltis
†Ceraurus
†Cheirurus (type genus)
†Chiozoon
†Contracheirurus
†Courtessolium
†Crotalocephalides
†Crotalocephalina
†Crotalocephalus
†Cybelloides
†Cyrtometopus
†Deiphon
†Didrepanon
†Eccoptochile
†Eccoptochiloides
†Forteyops
†Foulonia
†Gabriceraurus
†Geracephalina
†Hadromeros
†Hammannopyge
†Hapsiceraurus
†Heliomera
†Heliomeroides
†Holia
†Hyrokybe
†Junggarella
†Kawina
†Kolymella
†Krattaspis
†Ktenoura
†Laneites
†Lehua
†Leviceraurus
†Nieszkowskia
†Onycopyge
†Osekaspis
†Pandaspinapyga
†Paraceraurus
†Parasphaerexochus
†Parayoungia
†Parisoceraurus
†Pateraspis
†Patomaspis
†Placoparina
†Pompeckia
†Proromma
†Protocerauroides
†Pseudocheirurus
†Pseudosphaerexochus
†Radiurus
†Ratinkaspis
†Reraspis
†Skelipyx
†Sphaerexochus
†Sphaerocoryphe
†Stubblefieldia
†Sycophantia
†Turantyx
†Valongia
†Whittakerites
†Xylabion
†Xystocrania
†Youngia
†Zazvorkaspis

References

J.M. Adrian (2014). "20. A synopsis of Ordovician trilobite distribution and diversity". In D.A.T. Harper; T. Servais (eds.). Early Palaeozoic Biogeography and Palaeogeography. Memoirs of the Geological Society of London. Vol. 38. Geological Society of London. p. 490. ISBN 978-1862393738.